Fix typo in collections docs
Fix typo in collections docs

Joergen/olympia,muffinresearch/addons-server,mstriemer/zamboni,diox/zamboni,diox/zamboni,wagnerand/addons-server,elysium001/zamboni,jamesthechamp/zamboni,muffinresearch/olympia,atiqueahmedziad/addons-server,harry-7/addons-server,mozilla/addons-server,mozilla/zamboni,Witia1/olympia,Revanth47/addons-server,robhudson/zamboni,washort/zamboni,ayushagrawal288/zamboni,mrrrgn/olympia,atiqueahmedziad/addons-server,andymckay/zamboni,washort/zamboni,Prashant-Surya/addons-server,lavish205/olympia,wagnerand/addons-server,beni55/olympia,ddurst/zamboni,mozilla/zamboni,wagnerand/olympia,kumar303/zamboni,mstriemer/addons-server,Revanth47/addons-server,elysium001/zamboni,magopian/olympia,beni55/olympia,mozilla/addons-server,harry-7/addons-server,Witia1/olympia,tsl143/zamboni,mudithkr/zamboni,koehlermichael/olympia,harikishen/addons-server,johancz/olympia,aviarypl/mozilla-l10n-addons-server,harikishen/addons-server,Joergen/olympia,Joergen/zamboni,mozilla/zamboni,jpetto/olympia,mrrrgn/olympia,diox/olympia,Jobava/zamboni,Joergen/olympia,jamesthechamp/zamboni,diox/olympia,ayushagrawal288/zamboni,andymckay/addons-server,Nolski/olympia,mdaif/olympia,andymckay/zamboni,crdoconnor/olympia,robhudson/zamboni,jasonthomas/zamboni,SuriyaaKudoIsc/olympia,muffinresearch/olympia,tsl143/addons-server,tsl143/zamboni,shahbaz17/zamboni,andymckay/olympia,yfdyh000/olympia,jasonthomas/zamboni,mstriemer/addons-server,lavish205/olympia,jpetto/olympia,Jobava/zamboni,mrrrgn/olympia,spasovski/zamboni,robhudson/zamboni,diox/olympia,tsl143/zamboni,mdaif/olympia,ingenioustechie/zamboni,andymckay/addons-server,mudithkr/zamboni,yfdyh000/olympia,Hitechverma/zamboni,luckylavish/zamboni,muffinresearch/addons-server,mozilla/olympia,spasovski/zamboni,beni55/olympia,eviljeff/zamboni,kmaglione/olympia,anaran/olympia,spasovski/zamboni,Hitechverma/zamboni,magopian/olympia,robhudson/zamboni,SuriyaaKudoIsc/olympia,muffinresearch/olympia,yfdyh000/olympia,kmaglione/olympia,mozilla/zamboni,lavish205/olympia,eviljeff/olympia,mozilla/addons-server,atiqueahmedziad/addons-server,harikishen/addons-server,wagnerand/addons-server,eviljeff/olympia,Jobava/zamboni,clouserw/zamboni,kumar303/addons-server,aviarypl/mozilla-l10n-addons-server,muffinresearch/olympia,Joergen/zamboni,johancz/olympia,kumar303/zamboni,jamesthechamp/zamboni,shahbaz17/zamboni,magopian/olympia,harry-7/addons-server,ingenioustechie/zamboni,kumar303/olympia,psiinon/addons-server,mdaif/olympia,Hitechverma/zamboni,kumar303/addons-server,Joergen/olympia,bqbn/addons-server,yfdyh000/olympia,kmaglione/olympia,SuriyaaKudoIsc/olympia,tsl143/addons-server,bqbn/addons-server,mudithkr/zamboni,wagnerand/zamboni,mudithkr/zamboni,diox/zamboni,Revanth47/addons-server,andymckay/olympia,muffinresearch/addons-server,johancz/olympia,koehlermichael/olympia,tsl143/zamboni,bqbn/addons-server,kumar303/zamboni,muffinresearch/addons-server,tsl143/addons-server,kmaglione/olympia,mstriemer/zamboni,mozilla/olympia,Hitechverma/zamboni,ddurst/zamboni,magopian/olympia,andymckay/zamboni,mdaif/olympia,harry-7/addons-server,Revanth47/addons-server,beni55/olympia,mstriemer/zamboni,clouserw/zamboni,lavish205/olympia,koehlermichael/olympia,anaran/olympia,kumar303/addons-server,Prashant-Surya/addons-server,wagnerand/olympia,kumar303/olympia,mstriemer/olympia,kumar303/addons-server,mozilla/addons-server,muffinresearch/olympia,Joergen/zamboni,wagnerand/zamboni,jpetto/olympia,muffinresearch/addons-server,johancz/olympia,elysium001/zamboni,washort/zamboni,mrrrgn/olympia,Prashant-Surya/addons-server,beni55/olympia,ngokevin/zamboni,andymckay/olympia,psiinon/addons-server,andymckay/addons-server,eviljeff/zamboni,koehlermichael/olympia,harikishen/addons-server,luckylavish/zamboni,clouserw/zamboni,mozilla/olympia,Witia1/olympia,psiinon/addons-server,Joergen/olympia,Prashant-Surya/addons-server,Joergen/zamboni,psiinon/addons-server,crdoconnor/olympia,kumar303/olympia,mstriemer/zamboni,crdoconnor/olympia,jasonthomas/zamboni,wagnerand/zamboni,ngokevin/zamboni,ayushagrawal288/zamboni,luckylavish/zamboni,ddurst/zamboni,mstriemer/olympia,Nolski/olympia,wagnerand/olympia,ngokevin/zamboni,anaran/olympia,Joergen/zamboni,atiqueahmedziad/addons-server,ingenioustechie/zamboni,eviljeff/olympia,tsl143/addons-server,spasovski/zamboni,jamesthechamp/zamboni,aviarypl/mozilla-l10n-addons-server,diox/zamboni,andymckay/addons-server,wagnerand/olympia,crdoconnor/olympia,mdaif/olympia,wagnerand/zamboni,Jobava/zamboni,koehlermichael/olympia,SuriyaaKudoIsc/olympia,washort/zamboni,anaran/olympia,Joergen/zamboni,jpetto/olympia,mstriemer/addons-server,Nolski/olympia,mstriemer/olympia,Witia1/olympia,wagnerand/addons-server,magopian/olympia,kmaglione/olympia,eviljeff/olympia,mstriemer/addons-server,kumar303/zamboni,clouserw/zamboni,Witia1/olympia,diox/olympia,ayushagrawal288/zamboni,luckylavish/zamboni,shahbaz17/zamboni,kumar303/olympia,jasonthomas/zamboni,yfdyh000/olympia,johancz/olympia,crdoconnor/olympia,ddurst/zamboni,eviljeff/zamboni,Nolski/olympia,andymckay/olympia,bqbn/addons-server,ingenioustechie/zamboni,shahbaz17/zamboni,mrrrgn/olympia,eviljeff/zamboni,elysium001/zamboni,Nolski/olympia,aviarypl/mozilla-l10n-addons-server,mozilla/olympia,mstriemer/olympia